forEach在循环之前是否创建了数组的深层副本？

Here is an example

这是一个例子

arr1 = [{ b: 2 }, { a: 1 }] // an array with 2 elements

arr1.forEach(function (element, index, array) {

    console.log(element);
    console.log('of');
    console.log(array);
    console.log('');


    arr1.push({ c: 3 });
});

console.log(arr1);
arr1 = [{ b: 2 },